> My question is now how do I change the path name
> from
> <file://localhost/C:/My%20Web%20Sites/mcu2/www.xyz.ed>
> u/advantage.html
> 
> To simply go www.xyz.edu/advantage.html

Your question is unclear.
file://... is a url that points to the c:\\MyWeb...\\advantage.html
Do what you want with the files.
If you want the mirror to be a web site, move the files below www.xyz.edu to
the web server.